【摘 要】
：
Many countries have established and implemented legal truck weight limits for commercial vehicles to travel on their highways.They collectively refer to the limits on the truck gross weight,axle weigh
【机 构】
：
Illinois Institute of Technology, Chicago, IL, USA
论文部分内容阅读
Many countries have established and implemented legal truck weight limits for commercial vehicles to travel on their highways.They collectively refer to the limits on the truck gross weight,axle weights,and axle distances,as applicable.Not exceeding these limits,trucks may ravel without constraints within the jurisdiction.Overweight trucks are those exceeding the legal weight limits.Depending on jurisdiction,these trucks may or may not have to meet additional requirements to travel.This paper discusses research work recently performed in the US to manage overweight trucks and maintain highway bridge safety.An important feature of the effort is the usage of weigh-in-motion (WIM) measurement data of real truck weights and configurations in the relevant research work for enhanced quantitative decision making.
其他文献
根据国内某型混合动力汽车用镍氢动力电池组的试验结果，提出了将镍氢电池和超级电容在能量和功率方面的优势相结合的复合电源设计思路，对适合的系统连接形式、控制方法进行了介绍，通过仿真分析，对复合电源的性能优势及整车的节能潜力进行了量化计算及说明。
MH-Ni电池以较高的比能量,安全可靠性以及绿色环保性等优点成为混合动力车(HEV)电源的首选。为改善HEV的启动、加速等问题,镍氢电池的高功率性能成为人们研究的热点。通过不同活性物质装载量的电极的研究可知：当面密度为0.617kg/m2时,电极具有良好的氧化还原性和质子扩散速率；按照该装载量电极制备出的D型高功率镍氢动力电池,其功率密度可达到1200W/kg,能量密度达到49.4Wh/kg,改善
橄榄石型LiFePO4正极材料具有原料来源丰富、无毒、环境友好、理论容量较高、热稳定性和循环性能好等特点，是近年来迅速发展起来的一种锂离子电池的正极材料。本文综述了新型锂离子电池正极材料LiFePO4的研究进展，重点阐述了LiFePO4材料的结构、制备方法、改性研究。
本文研究了以Li4TisO12为负极,分别以LiCo0.sNi0.sMn0.5O2,LiMn2O4或LiFePO4为正极的锂电池体系。先筛选不同厂家的正负极材料,然后再匹配成电池做循环性能研究。测试表明,LiCo0.5Ni0.5Mn0.5O2,LiMn2O4与LiFePO4三种材料的初始容量分别为963mAh、931 mAh、960 mAh；500次充放电循环后容量保持率分别为96.56％、87.
本文将单桩有效桩长概念延伸至深厚软土区超长群桩基础。首先，引入剪切位移法导得群桩中各基桩桩侧摩阻力在桩周土中产生的位移场，并考虑各桩存在引起的位移折减效应，建立了计入桩—桩相互作用的桩侧单位厚度土等效刚度系数表达式；在此基础上，基于荷载传递法建立了各基桩的荷载传递微分方程，并考虑超长桩的荷载传递特性，建立了群桩有效桩长与桩顶容许沉降量之间的关系式，从而得出基于沉降控制的深厚软土区超长群桩有效桩长计
本文阐述了湖南省郴宁高速公路某桥梁8号墩立柱偏位的原因分析及纠偏处治方案的实施，希望能为同类工程提供参考。 该桥由于邻近路基挖方施工，将开挖的弃渣直接倾倒在桥墩旁，使桥墩直接承受弃渣的不均衡水平土压力作用。该桥墩覆盖层为薪土和强风化泥质灰岩，桥位处于山坡洼地长期积水浸泡，土体抗剪强度急剧降低，在lOm厚弃土不均衡的水平外力作用下桩基和立柱体系难以抵抗外力推动而产生侧向位移，致使该桥墩桩基顶部和系
Truck information is one of the important inputs for a sound pavement analysis,design,maintenance and management.While more efforts have been directed towards development of more accurate design metho
Pavement conditions are commonly described by the amount,severity,and frequency of pavement distresses.Transportation engineers prefer to measure,as accurately as they are able,cracking,rutting,and pa
This paper describes the pavement test on trafficking and coring at field on the R80 in Gauteng Province in details.The model Mobile Load Simulator(MLS) was applied on trial hot mix asphalt.The total
Developing inspection techniques and training inspectors became urgent for consistent and thorough inspection.To tackle this issue,old and deteriorated concrete and steel bridges,which were removed wi